Six Figure Work

Senior Scientist – Quantitative LC-MS Protein Bioanalysis

Amgen

Company websiteamgen.com (Amgen, opens in new tab)

Base salary $143,821  to $194,581

Employer-published annual base salary, USD. Advertised base range in South San Francisco, CA

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  • LocationSouth San Francisco, CA
  • WorkplaceOn-site
  • Status at last checkSource accepting applications when checked
  • Last checked (28 min ago) · observed since

About this job

Career Category

Scientific

Job Description

Join Amgen’s Mission of Serving Patients

At Amgen, if you feel like you’re part of something bigger, it’s because you are. Our shared mission—to serve patients living with serious illnesses—drives all that we do.

Since 1980, we’ve helped pioneer the world of biotech in our fight against the world’s toughest diseases. With our focus on four therapeutic areas –Oncology, Inflammation, General Medicine, and Rare Disease– we reach millions of patients each year. Amgen is advancing a broad and deep pipeline of medicines to treat cancer, heart disease, inflammatory conditions, rare diseases, and obesity and obesity-related conditions. As a member of the Amgen team, you’ll help make a lasting impact on the lives of patients as we research, manufacture, and deliver innovative medicines to help people live longer, fuller happier lives.

Our award-winning culture is collaborative, innovative, and science based. If you have a passion for challenges and the opportunities that lay within them, you’ll thrive as part of the Amgen team. Join us and transform the lives of patients while transforming your career.

What you will do

Let’s do this. Let’s change the world. In this vital role, you will join the Pharmacokinetics & Drug Metabolism – Bioanalytical Sciences (PKDM-BA) group to advance Amgen’s growing research portfolio. The successful candidate will develop and apply innovative, fit-for-purpose LC-MS-based bioanalytical assays for characterization of endogenous proteins, including distinct proteoforms and target-drug complexes. These assays will be used to assess target abundance, target engagement, protein turnover, subcellular trafficking kinetics, protein-protein interactions, and etc., across discovery and development programs. This scientist will be expected to identify the appropriate analytical approach for each biological question and develop new workflows when existing methods are insufficient.

The PKDM-BA team works in close partnership with cross-functional teams to support candidate selection, preclinical development, clinical evaluation, and regulatory submissions, including IND and NDA filings.

Key Responsibilities

  • Develop, optimize, and perform fit-for-purpose quantitative LC-MS assays to measure target proteins for the assessment of target abundance, target engagement, protein turnover, subcellular trafficking kinetics, protein-protein interactions, and etc.

  • Design and implement innovative bioanalytical strategies and workflows that support mechanistic understanding of drug-target interactions, pathway modulation, pharmacodynamic responses, and biomarker kinetics.

  • Apply quantitative mass spectrometry-based workflows to support studies in complex biological matrices, including plasma, tissue, and in vitro systems.

  • Develop and adapt sample preparation, enrichment, and LC-MS workflows based on the intended biological question and assay requirements, balancing sensitivity, selectivity, robustness, and turnaround time.

  • Independently troubleshoot assay development, sample preparation, data quality, and LC-MS instrument performance issues.

  • Collaborate with cross-functional project teams to interpret bioanalytical data in the context of PK/PD, translational biomarkers, target biology, and mechanisms of action.

  • Maintain accurate electronic laboratory notebook records, prepare technical reports, and communicate scientific results clearly to project teams and stakeholders.

What we expect of you

We are all different, yet we all use our unique contributions to serve patients. The scientific professional we seek will bring strong quantitative bioanalytical expertise, hands-on LC-MS experience, scientific curiosity, and a commitment to advancing development of innovative therapeutics through rigorous measurement of drug, target, and biomarker biology.

Basic Qualifications:

Doctorate degree in Analytical Chemistry, Biochemistry, Pharmaceutical Sciences, Chemical Biology, Proteomics, or a related discipline with strong LC-MS training

OR

Master’s degree and 4 years of relevant experience

OR

Bachelor’s degree and 6 years of relevant experience

Preferred Qualifications:

  • Proven expertise in LC-MS method development and quantitative bioanalysis in complex biological matrices.

  • Experience developing and applying quantitative assays for therapeutics, target engagement, target modulation, target dynamics, and biomarker biology.

  • Hands-on experience with proteomics workflows, including peptide mapping, enzymatic digestion, protein-drug adduct identification, intact or subunit analysis, and quantitative protein or peptide assays.

  • Experience with sample preparation techniques such as biological matrix processing, tissue homogenization, immunoaffinity capture, and other fit-for-purpose bioanalytical approaches.

  • Experience with automated sample preparation platforms such as AssayMAP Bravo, Tecan, KingFisher, or related systems.

  • Hands-on experience with LC-MS platforms, including high-flow, micro-flow, or nano-flow LC systems, triple quadrupole, Q-TOF, and Orbitrap systems.

  • Ability to independently troubleshoot analytical methods, sample preparation workflows, data quality issues, and instrument performance.

  • Strong communication, collaboration, and data interpretation skills, with the ability to present complex analytical results to multidisciplinary project teams.

Amgen will consider for employment qualified applicants with criminal histories in a manner consistent with the San Francisco Fair Chance Ordinance.

Salary Range

143,820.85USD -194,581.15 USD

Source: Amgen on Workday · View original posting (opens in new tab)

Pay in context

This role's base floor ($143,821) is above 39% of the 492 Science & Research roles in California listed on this site; 1 other lists the same floor. Their median floor is $159,477; the middle half runs from $126,066 to $200,000.

Only jobs on this site count, and each one publishes a base salary of $100,000 or more, so this compares six-figure jobs with each other, not with the whole market. Computed Nov 7, 2026.

This range next to 6 other live Amgen roles with the nearest advertised base floor
Chart as a table
This range next to 6 other live Amgen roles with the nearest advertised base floor
RolePublished base
Senior Scientist – Quantitative LC-MS Protein Bioanalysis (this listing)$143,821 - $194,581
Senior Manager, Manufacturing Systems Engineering (ASRS)$145,370 - $196,676
Field Reimbursement Manager - Miami, FL$145,471 - $196,813
Field Reimbursement Manager - Newark, NJ$145,471 - $196,813
Field Reimbursement Manager- Cleveland, Ohio$145,471 - $196,813
Field Reimbursement Manager- Portland, OR$145,471 - $196,813
Field Reimbursement Manager - New York Metro$145,471 - $196,813

Same $100K to $400K scale as every card. All Amgen roles · How to read the bar

Observed changes

  1. First observed on the employer's board
  2. Began meeting the published-salary criteria
Observed since
Employer-stated posting date
2026-09-23
Where this pay comes from

Location as the employer wrote it: US - California - South San Francisco

143,820.85USD -194,581.15 USD

Method
Employer text, read with fixed rules and re-verified
Checked
Rule set
us-base-v2

The pay passage appears in the employer's own job text. Fixed, deterministic rules located it, and the passage below was checked against the stored copy of the posting.

What we verified

  • The pay figures come from the employer's own listing, quoted exactly above.
  • The pay is an annual base salary in US dollars with a minimum of at least $100,000.
  • The role was publicly listed on the employer's job board when last checked.

We do not verify what the employer will actually offer, whether the employer is still recruiting for the role, or anything beyond what the employer published. Full methodology.

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